There is a new Kickstarter for a split style, mechanical keyboard, the KeyboardIO Atreus Kickstarter. It's a really small form-factor keyboard designed for fast touch typing.
I have used both a split keyboard and a mechanical one, and both are fantastic. Having both together, and in a highly portable package sounds fantastic, so it will be interesting to see how it pans out.
For more information about this Kickstarter, visit: